georefid:2013-036679SEDIS Publication Catalogue

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http://sedis.iodp.org/pub-catalogue/informationpointOfContact2013-07-08T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=10.1144/SP373.142013-01-01publicationgeorefid:2013-036679doi:10.1144/SP373.14Zhao, XixiUniversity of California at Santa Cruz, Earth and Planetary Sciences Department, Santa Cruz, CA, United StatesauthorOda, HirokuniGeological Survey of Japan, JapanauthorWu HuaichunChina University of Geosciences, ChinaauthorYamamoto, TomohiroDoshisha University, JapanauthorYamamoto, YuhjiKochi University, JapanauthorYamamoto, YuzuruJapan Agency for Marine-Earth Science and Technology, JapanauthorNakajima, TakeshiauthorKitamura, YujinauthorKanamatsu, ToshiyaauthorGeological Society of London, London, United KingdompublisherdocumentHardcopySpecial Publication - Geological Society of London373We conducted a palaeomagnetic study on the Cenozoic sedimentary sequences of the Nankai Trough, recovered by the Integrated Ocean Drilling Program Expedition 322 in SE Japan. Sedimentary sections of Late Miocene age from the two subduction input sites (sites C0011 and C0012) recorded a pattern of magnetic polarity reversals that correlates well with the known magnetic polarity time scale. The polarity of characteristic remanent magnetization could be identified throughout the majority of the recovered cores of the two sites, following removal of a low-stability drilling-induced remanence. Most of the observed magnetostratigraphy from the characteristic directions is in good agreement with that to be expected from the stratigraphic position of the sequence deduced from the biostratigraphic data. Palaeomagnetic data from both shipboard and shore-based studies indicate changes in the rate of sedimentation from 9.5 to 2.7 cm/kyr at about 11 Ma, suggesting that some fundamental palaeoenvironmental change in the Shikoku Basin and/or significant tectonic event may have occurred in Late Miocene.completedStratigraphySolid-earth geophysicsAsiabiostratigraphyCenozoiccharacteristic remanent magnetizationExpedition 322Far EastgeochronologyIntegrated Ocean Drilling ProgramIODP Site C0011IODP Site C0012JapanlithostratigraphymagnetizationmagnetostratigraphyMioceneNankai TroughNanTroSEIZENeogeneNorth PacificNorthwest PacificPacific Oceanpaleomagnetismrelative ageremanent magnetizationreversalssedimentary rocksShikokuShikoku Basinsoutheastern Japanstratigraphic unitsTertiaryupper MioceneWest Pacificurn:org.iodp:exp:322urnlargerWorkCitationcampaignurn:org.iodp:exp:319:site:C0011urnlargerWorkCitationstudyurn:org.iodp:exp:319urnlargerWorkCitationcampaignurn:org.iodp:exp:322:site:C0011urnlargerWorkCitationstudyurn:org.iodp:exp:322urnlargerWorkCitationcampaignurn:org.iodp:exp:333:site:C0011urnlargerWorkCitationstudyurn:org.iodp:exp:333urnlargerWorkCitationcampaignurn:org.iodp:exp:322:site:C0012urnlargerWorkCitationstudyurn:org.iodp:exp:322urnlargerWorkCitationcampaignurn:org.iodp:exp:333:site:C0012urnlargerWorkCitationstudyurn:org.iodp:exp:333urnlargerWorkCitationcampaignurn:org.iodp:exp:338:site:C0012urnlargerWorkCitationstudyurn:org.iodp:exp:338urnlargerWorkCitationcampaignEnglishgeoscientificInformation136.5200136.560032.440032.5000